/* file-p.c: file predicates. Copyright 1992, 1993, 1994, 2008, 2015, 2016 Karl Berry. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, see . */ #include #include /* Test whether FILENAME1 and FILENAME2 are actually the same file. If stat fails on either of the names, we return false, without error. */ boolean same_file_p (const_string filename1, const_string filename2) { #ifdef _WIN32 intptr_t handle1, handle2; FILE *f1, *f2; BY_HANDLE_FILE_INFORMATION fileinfo1, fileinfo2; f1 = fopen(filename1, "r"); if(!f1) return false; f2 = fopen(filename2, "r"); if(!f2) { fclose(f1); return false; } handle1 = _get_osfhandle(fileno(f1)); handle2 = _get_osfhandle(fileno(f2)); if (!GetFileInformationByHandle((HANDLE)handle1, &fileinfo1)) { fclose(f1); fclose(f2); return false; } if (!GetFileInformationByHandle((HANDLE)handle2, &fileinfo2)) { fclose(f1); fclose(f2); return false; } fclose(f1); fclose(f2); if (fileinfo1.dwVolumeSerialNumber == fileinfo2.dwVolumeSerialNumber && fileinfo1.nFileIndexHigh == fileinfo2.nFileIndexHigh && fileinfo1.nFileIndexLow == fileinfo2.nFileIndexLow) return true; else return false; #else struct stat sb1, sb2; /* These are put in variables only so the results can be inspected under gdb. */ int r1 = stat (filename1, &sb1); int r2 = stat (filename2, &sb2); return r1 == 0 && r2 == 0 ? SAME_FILE_P (sb1, sb2) : false; #endif }